Fuel + Spark = Still Won't Run!?!?!?!?!?

[onebad7up]

I have a 1989 Gt Vert and it used to have a h/c/i setup with a 60mm turbo kit. There were numerous supporting aftermarket parts on it as well.

Over the past few months I have taken it back to stock. Now that I am finished I cannot get it to run. Timing is popping through exhaust. This motor ran great before I put it in.

I am thinking that is a TFI wiring issue because a number of electronics were disconnected.

I took some readings tonight and I was wondering what everyone thought looked wrong.


With key 'ON'

Blue - 0 V
Y/G - 0 V
R/Bl - 120's mV
R/G - 10.7 V
G/Y - 4.35
Blck - 0 V



While Cranking

Blue - 0 V
Y/G - 0 V
R/Bl - 0 V
R/G - 5 V
G/Y - 4.35
Blck - 0 V


The one thing I noticed was the R/ Blue did not receive power on cranking. Is there anything else that is weird?

 

[hotcobra03]

Check direction on dist.and fire order,plugs can foul out with to much gas,popn sounds are timing related

 

[the pony boy]

i would say timing.search for top dead center.theres a ton of writeups for it.good luck phil

 

[onebad7up]

We have checked for TDC probably 5 times. It has new plugs. Tried different dizzys. Checked firing order. Swapped ECU's.

I am running out of options, which is what brought me back to wiring.

Any thoughts on the wiring?

 

[HISSIN50]

Do you have spark? Based on those number, I'm not sure you do.

 

[onebad7up]

Well it is popping out the exhaust so I think I do. I tried a couple cylinders with my spark tester and they lit up.

What do you think could be happening?

 

[hotcobra03]

I once was in a rush when installing wire after a cam swap.everything looked good and the direction was wrong but firing order was right.

 

[thexrcist68]

sounds to me like youre 180 out on the distributor, or on the cam

 

[1987stangman]

sounds to me like youre 180 out on the distributor, or on the cam

Yea, it sound like you may have TDC but is it TDC on the number one piston at it's compression stroke?

 

[thexrcist68]

the popping from the exhaust would tell that cyl 1 is on tdc of the exhaust stroke, pull the dizzy out and turn the rotor 180 degrees, and drop it back in leave everything else the same, it'll fire

 

[HISSIN50]

While cranking, the TFI needs to see voltage at the start-signal-in terminal. If that's missing, it's tough to start the car.

It's real quick to check spark and injector pulsing. You can hook an inductive timing light to a random plug wire to see if you have spark. A noid light makes it easy to check injector power and ground.

If you have those, I'd consider the TFI is probably ok for now. The above-thoughts regarding being out of phase are quite possible.